Message:Sefer Ha’mitzvos Ha’Katzar (The concise book of mitzvos)
By the Chofetz Chaim

This book lists the Torah mitzvos that can be observed today

Second Section – the Negative Commandments

99. It is a negative commandment "do not eat creeping creatures from the sea."

As it states in Vayikra (Leviticus) 11:43, "do not make your souls detestable with any creeping creature." Included in this law is creeping creatures that live in water, which are: frogs, crabs, and animals like them. Also, worms and leeches, sea animals, and sea dogs. One who eats an olive size amount of them receives lashes.